Security advisory

{
  "id": "fdeacbf109bc1e9d7b242afb013bfe15847b9d84fa4340bec3e4bb46e6727b12",
  "url": "https://osv.dev/vulnerability/CVE-2020-27818",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-27818",
    "summary": "A flaw was found in the check_chunk_name() function of pngcheck-2.4.0. An attacker able to pass a malicious file to be processed by pngcheck could cause a temporary denial of service, posing a low risk to application availability.",
    "evidence": "osv:CVE-2020-27818",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2020-27818",
      "aliases": [
        "CVE-2020-27818"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pnggroup/pngcheck",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5c1bdb452ee8bfdb6272d0bcc80193ae6e9bc449"
                },
                {
                  "last_affected": "5c1bdb452ee8bfdb6272d0bcc80193ae6e9bc449"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:libpng:pngcheck:2.4.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.4.0"
                      },
                      {
                        "last_affected": "2.4.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.4.0",
            "v2.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27818.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:34.851919417Z",
      "provider": "osv",
      "references": [
        "https://bodhi.fedoraproject.org/updates/FEDORA-2020-04d5e1ce26",
        "https://bodhi.fedoraproject.org/updates/FEDORA-2020-23432b7b72",
        "https://bodhi.fedoraproject.org/updates/FEDORA-2020-27b168926a",
        "https://bodhi.fedoraproject.org/updates/FEDORA-2020-4349e95c4f",
        "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-339db397ad",
        "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-6c93c61069",
        "https://lists.debian.org/debian-lts-announce/2022/05/msg00043.html",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1902011"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:*",
              "cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:8.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:extra_packages_for_enterprise_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.0"
                  },
                  {
                    "last_affected": "7.0"
                  },
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "31"
                  },
                  {
                    "last_affected": "31"
                  },
                  {
                    "introduced": "32"
                  },
                  {
                    "last_affected": "32"
                  },
                  {
                    "introduced": "33"
                  },
                  {
                    "last_affected": "33"
                  },
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-27818",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 433622,
  "published_at": "2020-12-08T01:15:12.32+00:00"
}